Changing Fractions to Common Denominator

What is the first step in adding fractions with different denominators?

• Multiply the denominators

• Subtract the denominators

• Add the numerators directly

• Find the least common multiple

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

To find a common denominator, you must find a common multiple of the denominators. What is this process called?

• Numerator addition

• Fraction simplification

• Denominator multiplication

• Least common multiple

What is the purpose of converting fractions to have a common denominator before adding them?

• To find the greatest common divisor

• To make the fractions larger

• To simplify the fractions

• To enable direct addition of numerators

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common multiple (LCM) of 10 and 6?

• 60

• 30

• 20

• 12

After finding the LCM, how do you convert 9/10 to have a denominator of 30?

• Multiply both numerator and denominator by 2

• Multiply both numerator and denominator by 3

• Divide both numerator and denominator by 3

• Add 20 to both numerator and denominator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

When converting fractions to have a common denominator, what must you do to the numerator?

• Divide it by the same factor as the denominator

• Multiply it by the same factor as the denominator

• Leave it unchanged

• Subtract it by the same factor as the denominator

What is 32/30 simplified?

• 4/3

• 8/7

• 16/15

• 2/1

What is the mixed number form of 16/15?

• 2 1/15

• 1 2/15

• 1 1/5

• 1 1/15

What is the least common multiple of 2 and 12?

• 4

• 24

• 12

• 6

How do you convert 1/2 to have a denominator of 12?

• Multiply both numerator and denominator by 12

• Add 10 to both numerator and denominator

• Divide both numerator and denominator by 2

• Multiply both numerator and denominator by 6

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1